♻️ Restructure: Move Astro to repository root

BREAKING CHANGE: Astro project is now at repository root
- Removed dealplustech-astro subdirectory
- Moved all Astro files to root
- Updated PostCSS config to .cjs
- Removed old Next.js files

✅ 11 pages built successfully
✅ Cookie consent banner included
✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/@astrojs/markdown-remark/dist/import-plugin-default.js

@@ -1,24 +0,0 @@
-import path from "node:path";
-import { pathToFileURL } from "node:url";
-import { resolve as importMetaResolve } from "import-meta-resolve";
-let cwdUrlStr;
-async function importPlugin(p) {
-  try {
-    const importResult2 = await import(
-      /* @vite-ignore */
-      p
-    );
-    return importResult2.default;
-  } catch {
-  }
-  cwdUrlStr ??= pathToFileURL(path.join(process.cwd(), "package.json")).toString();
-  const resolved = importMetaResolve(p, cwdUrlStr);
-  const importResult = await import(
-    /* @vite-ignore */
-    resolved
-  );
-  return importResult.default;
-}
-export {
-  importPlugin
-};